Banach, Stefan, b 30 March 1892 in Cracow, d 31 August 1945 in Lviv. Noted mathematician, professor at Lviv University in 1924–45, corresponding member of the Academy of Sciences of the Ukrainian SSR. Banach was one of the founders of modern functional analysis and helped develop the theory of topological vector spaces. His major work was Théorie des opérations linéaires (1932).

[This article originally appeared in the Encyclopedia of Ukraine, vol. 1 (1984).]